Albert a



NITED STATES PATENT OFFICE.

ALBERT A. WOOD, OF NEW YORK, N. Y.

VALVE-GEAR.

Specification of Letters Patent No. 23,137, dated March 1, 1859.

To all whom 'it may concern:

Be it known that I, ALBERT A. Woon, of New York, in the county yof New York and State of New York, have invented an Improvement in Valve-Gears, the construction and operation of which I have described in the following speciiication and illustrated in its accompanying drawings with sufficient clearness to enable competent and skilful workmen in the arts to which it pertains `or is most nearly allied to make and use my invention.

My said invention consists in the combination of two links placed within the strap as described, in the construction of the valve gear of an engine, said parts being operated by an eccentric to give motion to the valves, and made adjustable to regulate the admission of steam to the cylinder, as hereinafter more fully set forth.

This invention is represented in the drawings which accompany this description as follows Figure l is a side elevation of my valve gear, showing its connection to the shaft of an engine, the adjusting apparatus, and the construction generally of the external parts. Fig. 2 is a plan. Fig. 3 is a side elevation reverse to Fig. 1, with one of the side plates in which the outer' link as formed, removed. Fig. 4 is a transverse vertical section showing the parts at the right hand of the line .fr as drawn across Figs. l and 2.

A is the main shaft of the engine `or at least the shaft upon which the eccentric B which operates the valves is placed. This eccentric B is surrounded by a box or slide O which slides in the link D as it may be moved by the operation of the parts. This link D is firmly attached to the link E E,

.which crosses said link D at right angles.

The link E E is allowed a sliding motion upon the shaft to give motion to the valves. This link is made in two parts E E as shown. The motion given to the valves by the throw of the eccentric is regulated by the position of the links in the eccentric strap, or more properly the ring F and th ese links are therefore so arranged and connected to the adjusting gear as to be capable of being changed thereby to any desired position to cut off the steam to correspond with the work to be done. Y

Various arrangements may be used for adjusting the links to the proper position, all of them amounting essentially to the same thing, or at least answering the purpose. The plan I have adopted is to construct a bevel gear e upon the part E of the link E E and operated by means of the pinion G on the shaft H which is hung in brackets or studs i 7l upon the eccentric rod I which communicates motion from the links to the arm J of the rock shaft. the greatest travel to the valve the links should be turned into the position in which they are represented in Fig. l, or in other words, the position which will bring the To give slot k in the link E E lengthwise of the eccentric rod I. The shaft H is rotated to put the links in position by means of the hand wheel m. A set screw n, furnishes the means of securing it from a change of position when set as desired. The links may be hung to the eccentric rod in some manner different from the one I have shown and described, but I consider this as convenient as any with which I am acquainted.

The particular improvement which constitutes my said invention, and which I claim as having been originally and rst invented by me is- The combinationof the links I) and E E attached to the eccentric rod and arranged with adjusting gear as described or in manner equivalent.

ALBERT A. WOOD. Witnesses: i

JAS. F. GRIDLEY, Trios. B. How. 

